Insignia Underheating / long preheat time

Oven heats but does not reach set temperature or takes excessively long to preheat.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Weak bake element, Faulty oven temperature sensor, Incorrect calibration, Door gasket heat loss

How to Fix / Troubleshooting

Safety First: Disconnect power before removing panels or elements.

  • Verify temperature: Use an oven thermometer to compare actual temperature to the setpoint. Note the difference after 20–30 minutes of preheat.
  • Inspect bake element: Check the bake element for cold spots or discoloration. Test resistance; replace if open or visibly damaged.
  • Test sensor: Measure the oven temperature sensor resistance at room temperature and compare to spec (~1050–1100 Ω). Replace if out of range.
  • Check door gasket: Inspect the oven door gasket for gaps, tears, or flattening. Replace if it does not seal evenly around the door.
  • Calibrate: Use the oven’s settings menu to adjust temperature calibration if the hardware is good but the oven is consistently off by a small amount.
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Repair Difficulty

Medium 3/5

Required Part

Oven Temperature Sensor
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